import tkinter as tk

root = tk.Tk()
root.geometry("500x300+100+100")

# column默认值是0
tk.Entry(root).grid(row=1, column=1)
tk.Entry(root).grid(row=1, column=2)
# row span 跨行
tk.Entry(root).grid(row=1, column=3, rowspan=2)

tk.Entry(root, width=40, bg='red').grid(row=2, column=1, columnspan=2)
# tk.Entry(root).grid(row=2, column=2)
# tk.Entry(root).grid(row=2, column=3)

tk.mainloop()
